GEOLOGY

Detailed explanation-1: -The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.

Detailed explanation-2: -Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail.

Detailed explanation-3: -As Ampere suggested, a magnetic field is produced whenever an electrical charge is in motion. The spinning and orbiting of the nucleus of an atom produces a magnetic field as does electrical current flowing through a wire. The direction of the spin and orbit determine the direction of the magnetic field.

Detailed explanation-4: -So, an electromagnet is a magnet that is created by electricity. The really important thing to remember today is that electricity can create a magnetic field. This may sound strange, because we’re used to magnetic fields just coming from magnets, but it is really true!

Detailed explanation-5: -Generators, motors, and transformers. Electric buzzers and bells. Headphones and loudspeakers. Relays and valves. Data storage devices like VCRs, tape recorders, hard discs, etc. Induction cooker. Magnetic locks. MRI machines. More items